Hi,

Thanks for you plugin! I'm testing the plugin and I don't manage to do one thing: I'd like to use the heading_offset option to set it for each include by default:

So here is my config:

site_name: Foo
plugins:
  - include-markdown:
      heading_offset: 2

And my index.md:

{% include-markdown './included.md' start='<--start-->' %}

and the

Some ignored content.

<--start-->

Some included content.


# My heading

I'd like My heading to be and <h3> but it doesn't seem to work here.

Could you tell me if it is a bug or if I misunderstood the doc?

Thanks